[AC-2544] Drag and Drop Bug in 3.1.3

Hi everybody, I have a problem for drag and drop a simple view (or image) in a window. Even the script of KitchenSink doesn't work. The animation of the circle, is jerky and no smoothie. Someone has a solution for this problem? Thank you very much. Code : var win = Ti.UI.createWindow({ backgroundColor : "#fff" }); var X,Y,top,left; var viewToDrag = Ti.UI.createView({ top : 30, left : 30, height : 50, width : 50, backgroundColor : 'red' }); win.add(viewToDrag); viewToDrag.addEventListener('touchstart', function(e) { X = e.x; Y = e.y; }); viewToDrag.addEventListener('touchmove', function(e) { left = e.x - X; top = e.y - Y; }); viewToDrag.addEventListener('touchend', function(e) { viewToDrag.left = left; viewToDrag.top = top; }); win.open();